I did a lot of research on both the products and the different stores selling tankless water heaters. I found Rheem to be a top tier brands with some of the best reviews, warranty and units, but at a much better price than the other brands in that top tier. After deciding on Rheem, choosing to buy from TanklessWaterHeaterDepot.com was an easy choice. They have the best prices, free shipping, and shipped my unit the day it was ordered. The unit arrived safely and I couldn't be happier with it or the service I received from TanklessWaterHeaterDepot.com. Thank You :)